<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <script src="https://cdn.bootcss.com/vue/2.5.17/vue.js"></script>
  <title>vue</title>
</head>
<body>
<div id="root">
  <p>{{name}}</p>
  <p>{{upperName}}</p>
</div>
<script>
  let vm=new Vue({
    el: '#root',
    data: {
      name:'ahhh'
    },
    computed: {
      /*
        emmm 这样也算
        原来的不行 经过自己处理满足现在需求 也算
      */
      upperName() {
        return this.name.toUpperCase();
      }
    }
  });
</script>
</body>
</html>
